Fluid pump



A. c. woop FLUID PUMP Filed sept. 13,v 1930 sept. s, 1932.

Patented Sept. 6, 1932 Unirse stares ANDREW c. Woon, or eHrcAG'a'iLiiNors Y rLUiDruMr Application led. September 1?., 1930i. Serial `Noif'lliLlM.,Y

This invention relates to fluid pumps and particularly1 to that class of pumps wherein the operation of thepump is controlled by the quantity of-fluid passing therethrough.

The' present invention is particularly adaptable for use in connection'with devices requiring varying vquant-ities `of fluid, for

their operation, as, for example, internalV combustion engines, in thev operation of which, varying-'quantities of'fuel per minute pass through the carburetor, dependingfupon the speed or power deliveredL byI the engine.

One lobject of the present invention is tof provide a novel construction Vandarrangef ment whereby a predetermined maximum i quantity of fluid in the reservoir ofthe pump Will serve to actuate suitable mechanism for disconnecting the pump pistonifrom its actuating member or rod.

Another object of the invention is to pro-` vide novel means for connecting `'the pump piston and actuating rod when the fluid in the reservoir of the pump is below a predetermined minimum level, the said connecting means bei-ng operable to disconnect the piston and rod when the predetermined maximum level is,v obtained. c,

Another object of the invention is to provide a novel construction and arrangementl for maintaining the various elementsoftheV connecting mechanism and the actuating means therefor mi proper relative position With respect to each other.

of Checl: valves for controlling the flow of fluid pumped into thevreservoir.

A still further object of the present invenl tion is to improve -de'vicesof the-characterdisclosed in sundry details hereinafter described and more particularly'pointed outin )um-n or elevatin` device embod ine" i ze Y c :n

features of the present invention;

F ig. 2 isa sectional plan vievv` ofthe strucillustrative embodiment; andl Y 5 ture shown in Fig. l" and taken as indicatedv bythe line 242 thereof; c f l Fig. 3 is a perspective view -of the pistonl actuating member vor rod employed in the fill Fig. is a perspective view of a collar or spring engaging Washer vadaptedto be positioned on the actuating rod. 1`

The illustrative embodiment of the press' ent invention comprises a casing' having preferably cylindrical side Walls 6, base '97, and cover or top 8 secured to the side Walls by means of cap screws r9, thebase 7 having an inlet portll andoutletport 12 formed therein, the port 11 beingprovided With a suitable fitting 13 adapted to be connected to'l a suit-able source vof fluid supply, While the outlet port 1-2 is provided With'a fitting y14- by Whichthe pump may be connected With any suitable device designed for the use or consumption 'of fluid as, for example, an internal combustion engine, and in connection with Which'the present invention Will-be described as toits operation. i. Y

The inlet port llis provided'with a' check valve shown, in the present instance, as coni-y prising a fiat platA 15 adapted to engage a valve seat 16 and pivotally connectedto one end of an arm 17, Which in turn is pivotally mounted on al bracket 18 carried by the base 7.`

A Also mounted' on thelbase Within the casing 5, and preferably `spaced fromvthe Walls 6 thereof, is a pump cylinder 19 sur- A further object of the invention is to pro-lp rounding the intake port 11 and having up;

' vide a novel construction and arrangement vvardlyextending guides 21 associated there- A With Vand positioned diametrically Vopposite each other,v the said .guides extending upthe casing.. '1 .Y i i fSlidably mounted in the cylinder 19 isla piston 22 having a port or passage 23 'formed' therein, the said passage being provided with a check valve similar in construction to the valve 15 associated with the 'inlet port 11 and comprising a plate 24; pivotally connected to 95 one end of an arm' 25, Which vinturn` is pivotally mountedv on a bracket 26 carried byr a portion of the piston. w 1 :y `Mounted onl the piston22 and preferably y pivoted thereto is a yoke 27 formed of suit- 109 Wardly to a point adjacent the upper end of v Yis able material bent upon itself in a manner to form a bight portion 28 and downwardly extending substantially parallel leg portions 29, the lower ends of which are vapertured to receive a pivot pin 31 mounted in upwardly extending ears 32 formed substantially diammetrically oppositeeach other on the piston'22.

For reciprocating the piston 22 within the cylinder 19, a piston actuating member or rod 33 is slidably mounted in the casing,V preferably through the use of a stufling boxl 34 suitably positioned in the cover 'or top plate 8 of the casing, the upper end of the member l33 Vbeing pivotally connected at 35 to an armv 3 6 intermediate its end portions. The arm 36 is pivotally vconnected at 37` ad-N jacent one of its end Vportions to the upper end of a link 38, the lower end of which 1s pivotally mounted ona bracket 39 carried by the top plate 8; of the casing. c

The opposite or free end of the arm 36, 1n the present instance, is provided with an aperture 41 by which the arm may be connected lto anysuitable .continuously operated driving mechanism "for oscillating the arm: and reciprocatingV the piston actuating member 33 in the stuffing box 34. n

The piston actuating member 33 is shown in Fig. 3 of the drawing, andin the present structure, comprises a rod having its upper portion of cylindrical form provided adj acent its upper end with a slot 42 adapted to receive the arm 36 while the lower end of the f member or rod is flattened or cutaway as indicated at 43 in a manner to form shoulders 44 vat opposite sidesof the flattened portiong TheeXtreme lower end ofthe portion 43 is cut away or notched on its opposite edges as indicated at 45 in 5a manner to form ,a head 46 at its lower end, the flattened or reduced portion 43 of the piston actuating member 33 being adapted to be` slidably positioned in a correspondingly formed aperture 47 formed in thefbight portion 28 of the yoke 27 in a manner to maintainthe yoke ina substantially vertical position on its pivot rodv 31`.

For operatively connecting the piston V22 and yoke 27 to the piston actuating member 33, a' plurality of levers 48 are pivotally mounted at 49 on theY yoke 27 between the leg portions 29 thereof and are. provided at one side ofY their pivotal connection with vdownwardly and inwardly extending pawl-- like portions 51 adjacent their lower ends adapted'for engagement with thehead 46,

while at the Vopposite, side of their pivotal connections, the levers 48 are provided with upwardly and outwardly extending portions 52 which serve, by reason off their position and weight, to yieldingly'urge the pawl-like portionsf51 toward the notched portions 45 of the member 33 and into the pathy of movement of the head 46 in a manner' to beengaged thereby lfor moving the piston'V 22 in an upward direction when the member 33 is moved upwardly. `For moving the piston 22 and yoke 27 VV in theopposite 'or downwardly direction, a collar (Figs. 1 and 4) is provided with an elongated aperture 54 adapted to receiveA the flattened portion 43 ofthe member 33` in a manner to permit the positioning of the collar against the shoulders 44 formed on the member 33, and surrounding the portion 43 and positioned between the coll`ar`53 and bight portion 28 of the yoke 27 is a helically `coiled. spring 55 suiiiciently `strong to overcome the weightv of the check the cylinderv'19 into the space or channel 1 formed between the cylinder and the ywalls 6 of the casing,y and thence through the outlet port 12 and iitting 14 to a device where the liuidis employed or consumed as, for eXample, to an internal combustion engine employing liquid-fuel for'its operation.

For controlling the effective operation of the piston by the quantity of fuel contained in the casing 5, a float 57 is provided and lshown in the present instance as comprising a ypluralityof sections 58 and 59 (see Fig. 2)

positioned on opposite sides of the yoke 27- andthe guides 21, by which the sections 58 and 59 are. maintained in spaced relation with respect to the yoke 27.

The float sections 58 and 59 may be formed of any suitable material such as cork, vor the like, and connected together at opposite edges of the yoke 27 by means of rods 61 so4 spacedand positioned with respect to the yoke that as the float rises within the casing 5, the rods will engage the portions 52 of the levers 48 in a manner to rock'them about their pivotal connections 49, as "indicated by dotted lines inFig. 1, thereby withdrawing the pawllike portions 51 of the levers out of the notches 45 and yout of the path of movement of the head 46, which will permit thel continued reciprocation of the'piston actuating member 33 in its mounting without in any way affect ing the position of the piston 22.

the guides 21 prevent anyfmaterial amount of rotary movement of the float 57 thereby maintaining the rods 61 in position Lto properly engage the portions 52 of the levers 48 for effecting the release of the *portions 519 from engagement withthe head 46.

It will be noted that in the present instance, y

A 'It will be noted also that when fthe piston 22 is in its vlowermost position, as showninj Fig. 1, the spring 55 is compressedand a slight clearance obtains between the head 46 andpawl-lilre portions 51 torprovide ample clearance of the portions 51 to effect their free release from engagement with the head when the levers 48 are rocked about their pivotal connections with the yoke 27V when the portions 52 of the levers are engaged by the rods 61. i

i Considering the present invention as used in conjunction with an 'internal combustion engine forsupplying fuel to the float chamber associated with the carburetor thereof,'the operation of the illustrative device is" substantially as follows: `With the elements in the position shown in full lines in Fig. 1 of the drawing, the oscillationof the arm 36 and reciprocati'n` of the member 33 will cause the piston 22xto be reciprocated and on its upward movement to draw fuel through the intake port 11 and past the check valve 15 into the cylinderV beneath the piston 22, and` on `its downward movement, the valve 15 will close' and the valve 24 in the piston will yieldxto permit the fuel to passthrough the port 23 to the upper side of the piston where it willbe retained bythe closing of the valve 24 until'sufiicient quantity has been Aobtained to overflow the upper edge 56V of the cylinder- 19 into the space between the cylinder and side walls 6 of the casing, from lwhich it will flow `through the outlet port 12,'f`1tting 14 and thence to the ioat .chamber associ-ated withA the carburetor of theengine. As the fuel ac:-

cumulates within the casing 5to `an extent be t yond the quantity requiredfor the operation of the engine, the float will rise until a pre-` determined levelof the fuel Yin the housingv has been reached, at which time the rods 6l will engage the portions: v52 ofthe levers'48 in a mannerto rock the levers 48 about their pivotal connections 49 as indicated in dotted.

lines in "F ig. 1, thereby withdrawing theportions 51 from engagement with the head 46,

and in so doing, disconnect the piston froln` the actuatlng'member 33wh1ch may continue to reciprocate without in any way affecting portions 52 will serve to urge the pawl-like portions 51 of the levers 48 into the notches 45 and into the path of movement of the head I 46 in a manner to be engaged thereby upon an upward movement of the piston actuating member 33, thus it will be vobservedthat an operative connection is automatically established, after which the piston will resume 'itsA reciprocating movements'in the manner above,

described until sufficient fuel has again accu'- mulated within theca'sing to c'ausefthe .float tof rise 'and the rods61 toagainengagethe portions 52 of the levers 4,8; 1 :-v n, It will be observed fromthe" foregoingdescription'that'the present invention provides a novel construction and larrangement* for; pumping or elevating fluids, and wherein' novel means are providedforfcontrolling the operation of the pump according to the quantity of fluidin thereservoirforcasing thereof, and that the presentinvention also Vprovides a novelconstruction and arrangement for ac` tuati-ng and maintainig certain elementsof the device in suitable and desirable'operative positionv y with 'respect to other; elements thereof. t ,i f

Obviously/the present invention `is not` limitedto the precise constructon andar` rangement shown and described as the same may be variously modified.` Moreover, allthe features of 'thepresent invention needllot be used ,co'nj ointly as the same may be used toadef outlet ports, a pump cylinder postionedjin,

said casing and spaced'therefrom in a manner toform a reservoirga reciprocating piston mountedin sa1dcylindery an actuating member slidably mounted' 1n the, casing and` class i described,@theL automatically connectible to said piston, af

ioat, and? flea-t actuatedrmeansfor positively disconnecting said member from the piston.,` V2. In a device Vofthe class` described, the

combination'of a casingv having inletjand outlet; ports, ,a `pump` cylinder positioned in said-casing, a piston operativelyrelated-l to said cylinder, a yoke` pivotaliy mounted onA said piston, a pistonfactuating member. slidably mounted im said casing and movable with respect to said yoke, means pivotally mounted on the yoke for automatically,env-y gaging said member in a manner to operatively connect the member and yoke together when the fluid in the casing is below ay pre. determined level, a float, and means carried thereby for actuatingsaid connecting means in a manner to positivelyV vdisconnect vsaid member and yoke when the duid :in said casing attains a predetermined level. c 3. In a device of the class describedthie combination of a casing having inletv andv outlet ports, a check valve operatively re lated to said inlet port, a Vpump cylinder l mounted in said casing and surrounding said,-

valveand inlet eport, a pistonl operatively related to saidcylinder, a checkvalvein said piston, a'yoke mounted'on the'rpiston, a; piston actuating member slidably mounted"` in said casing and having a notch formedtheremeans carried on said float and engageable with -saidlever-'or positively moving the lever out of said'notch.-

j Ina deviceof the class desoribed,fthe combination yof acasing having inlet and outlet ports, a check'` valve operatively lrelated to said inlet kport, Va pump cylinder mounted in said casing andsurrounding said' valve and inlet port, apiston operatively. related to said cylinder, acheck valvein said' piston, a yoke pivotally mounted on the piston, a piston actuating memberslid#l ably mounted in 'said casingy and having notches formed therein at opposite sides thereof, `a plurality of levers pivotally mounted on said yoke at opposite sides ofv saidmember and movable into said notches, a

float, means carried byjsaid iloat and en# gageable with'said levers for" movingthe levers out osaid notches, `and meansfor guiding said loat'in a manner to rmaintain'v said,v lever vengaging means in operative p0- sltion wlth respect to said levers.;

` f 5. In a device of the class described, the f combination of la casing having inlet and voutlet ports, a pump Ycylinder mounted in said casing, a` piston operativelyrelate'd `to Saidcylinder, av yoke mounted on said piston, a piston actuating membervhaving a head formed thereon, la plurality of levers pivotally mounted on said yoke and engageable with said head for moving said piston 'in one direction, resilient means operatively-related to said yoke and actuating member for-- v,- moving saidV piston-in the opposite direction,

a float, .and means carried thereby for engaging saidlevers in amanner to move the levers outfof engagement with said head.

6.' Inf-a device of'theflclass described', the combination' of a casing having inletand l outlet ports, a pump cylinder mountedin said casing, a piston operatively related to1 said cylinder, a yoke mounted on said piston,

a piston actuating member having a head formed thereon, a plura-lityof levers pivotally mounted on vsaid yoke'and engageable with said head for moving said piston in one direction, resilient means operatively related to said yoke and actuating member for moving said piston in the opposite direction and for permitting a downward vmovement of said member with respect tosaid pistonin a manner to provide a clearance to facilitateY the engagement and disengagement of said levers and head, a float, and means carried thereby for engaging said levers in a manner to movethe levers out of engagementy with said-head. n

7.*In a device of the class described, the

combination ofl a casing havingffinlet and outlet ports, apump cylinder mounted in saidfcasing, a piston operatively related to said cylinder, a yoke mounted on said lpisv ton, apiston actuating member Vhaving a shoulder and head formed thereon, a pluralityV of' levers pivotally mounted. onV said yokeand engageable with saidy head for moving said piston in one direction, resilient means operativelyrelated tosaid yoke and shoulder for moving said piston inthe oppo- Y site direction, a float, means carried thereby orengaging said levers in a manner to move the levers out of engagement/'with said-head, and-guides for maintaining said lever engaging means in `operative position .with respect to said levers.

' v8.- In adevice of the r-class described, the

combination otra casing having inlet and out# let ports, apump cylinder mountedin said casing,'apiston operatively related to said cylinder, a yoke mounted on said piston, 'a piston actuating; member having a head Vformed thereon, a plurality of levers pivotally 9. In a device of the class described, the' Q combinationof a casing` having inlet andoutlet'ports, a pump cylinder Lmounted in said casing, a piston operatively related' to said cylinder, vaeyoke mounted on said piston, a

piston actuating member having a shoulder and a head formed thereon, a plurality of levers pivotally mounted on said yoke :and having pawl-like portionson' one side of their pivotal 'centers engageable with said head for movingv said piston in one direction and also lportions extending outwardly from the pivotal centers adapted to move said pawl-like portions into the path of movement of -said head, resilient means operatively related' to said yoke and shoulder for moving said piston in the opposite direction, a float, means carried thereby for connecting portions of the float together and engage'able with the outwardly'extending portions of the levers in a manner to move the pawl-like portions there# of out of Aengagement with said head, and

guides extending upwardly between portions of said oat for maintainingsaid lever` engaging meansin operative position with rei spect to the outwardly extending portions of' said levers. Y

10. In a device of the class described, the combination of a casing having inlet and outlet ports, a pump,cylinder mountedjin said casing, a piston operatively related to said. cylinder, a yoke mounted on said piston, a" piston actuating member having a shoulder' and head formed thereon, a plurality of levvers pivotally mounted on said yoke and having pawl-like portions adjacent their lower ends at one side of their pivotal centers and engageable with said head for moving said piston in one direction and also portions ex- Y tending'outwardly from the pivotal centers adapted to move said pawl-like portions into the path of movement of said head, resilient tween portions of said lioat for maintaining Y said lever engaging means in operative position with respect tothe outwardly extending portions of the levers and for maintaining the iioat out of engagement with said yoke.

1l. In a device of the class described, Athe combination of a casing having vertical side walls, a pump cylinder extending upwardly insaid casing and spaced from the walls thereof, said casing having an inlet port posip tioned in said cylinder and an outlet port positioned between said cylinder and side walls, a check valve operatively related to said inlet port, a piston mounted in said cylinder, a check valve mounted in said piston, a yoke pivotally mounted on said piston, a piston actuating member slidably mounted in said casing and operatively related to said yoke in a manner to maintain the yoke in a substantially vertical position, a head and shoulder formed on said member, a plurality of levers pivotally mounted on said yoke and having downwardly extending pawl-like portions and outwardly extending portions adapted to move said pawl-like portions inwardly to engage said head for moving the piston in one direction, resilient means operatively related to said yoke and shoulder for moving said piston in the opposite direction, a float formed of a plurality of sections positioned respectively on opposite sides of said yoke, a plurality of rods connecting said float sections and adapted to engage the outwardly extending portions of said levers in a manner to move the pawl-like portions thereof out of engagement with said head, guide members extending upwardly from said cylinder between said float sections and engageable therewith for maintaining the sections in spaced relation with respect to the yoke and for maintaining said rods in operative position with respect to said levers.

In witness whereof I hereunto subscribe my name this 2nd day of September A. D., 

